I would check fuel pressure at rail w/gauge and not depend on pressure sensor. Harbor freight has a $30 fuel pressure tester.
Odd that engine doesn't run w/starting fluid if you have spark. Are you spraying for at least 5 seconds while cranking?
90 psi is low compression. Is engine flooded? Are plugs wet w/fuel? Is there any fuel odor at all on plugs? A flooded engine will wash oil from cylinder walls and reduce compression.
Scan for errors with ISTA and post.
Run ISTA test plan for codes.
An intake leak that causes air to bypass the MAF will prevent DME from injecting the correct amount of fuel and can prevent starting. Remove all ductwork between throttle body and MAF and inspect for leaks/cracks.
Engine will run w/o MAF. With ignition off, disconnect MAF and try to start.